[Gypsum] [Plywood] sheathing that is installed on the exterior side of the
cold-formed steel framing system shall have a minimum thickness of 13 mm
1/2 inch and shall be 1.2 m 4 feet wide. [Glass mat gypsum sheathing shall
conform to ASTM C 79/C 79M and ASTM C 1177/C 1177M. Glass mat gypsum
sheathing shall have a water-resistant core with a water-resistant glass
mat embedded onto core and shall have a zero flame, zero smoke developed,
and shall have mold and mildew resistant surface.] [Gypsum sheathing shall
conform to ASTM C 79/C 79M. Gypsum sheathing shall have a water-resistant
gypsum core with a water-repellent paper firmly bonded to the core.]
[Plywood sheathing shall be in accordance with PS1, grade C-D with exterior
glue.]
2.8
MOISTURE PROTECTION
2.8.1
Moisture Barrier
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NOTE: When specifying Glass Mat Gypsum Sheathing it
is not required to fill holes or gaps with caulk to
protect sheathing from weather; however, to meet
ASTM E 283 air infiltration, and ASTM E 331 water
penetration, joints, holes and gaps should be
caulked per manufacturers specifications. Building
felt is not required either when installing Glass
Mat Sheathing, unless required by local code.
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The moisture barrier shall be 6.7 kg 15-lb asphalt-saturated felt
conforming to ASTM D 226 Type I (No. 15).
2.8.2
Vapor Retarder
The vapor retarder shall be polyethylene film conforming to ASTM D 2103,
0.15 mm (6 mil) 6 mil minimum thickness.
2.8.3
Staples
Staples for attaching the moisture barrier to the exterior sheathing shall
be the type and size best suited to provide a secure connection. Staples
shall be made from either galvanized steel or stainless steel wire.
2.8.4
Joint Tape
Tape for sealing the joints in the vapor retarder shall be laminated tape
with pressure sensitive adhesive as recommended by the manufacturer of the
polyethylene film.
2.9
VENEER ANCHORS
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NOTE: The anchors specified in this paragraph
include anchors for attachment of the masonry veneer
to the steel framing system as well as attachment to
structural steel or concrete beam, column and floor
slab elements. Anchors for attachment of masonry
veneer to concrete or concrete masonry backup walls
(structural or nonstructural) are not covered by
this guide specification. Instead, UFGS [03300A
CAST-IN-PLACE STRUCTURAL CONCRETE][03300N
SECTION 04810
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